package org.anyrtc.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;

/**
 * 获得屏幕相关的辅助类
 * 
 */
public class ScreenUtils {
	private ScreenUtils() {
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	}

	/**
	 * 获得屏幕高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenWidth(Context context) {
		WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.widthPixels;
	}

	/**
	 * 获得屏幕宽度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenHeight(Context context) {
		WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.heightPixels;
	}

	/**
	 * 判断是否为平板
	 * 
	 * @return
	 */
	public static boolean isPad(Context context) {

		DisplayMetrics dm = context.getResources().getDisplayMetrics();
		int width = dm.widthPixels;
		int height = dm.heightPixels;
		double x = Math.pow(width, 2);
		double y = Math.pow(height, 2);
		double diagonal = Math.sqrt(x + y);

		int dens = dm.densityDpi;
		double screenInches = diagonal / (double) dens;
		Log.e("ScreenUtils", "The screenInches " + screenInches);
		// 大于6尺寸则为Pad
		if (screenInches >= 6.0) {
			return true;
		}
		return false;

	}

	/**
	 * 获得状态栏的高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getStatusHeight(Context context) {

		int statusHeight = -1;
		try {
			Class<?> clazz = Class.forName("com.android.internal.R$dimen");
			Object object = clazz.newInstance();
			int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString());
			statusHeight = context.getResources().getDimensionPixelSize(height);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return statusHeight;
	}

	/**
	 * 获取当前屏幕截图，包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithStatusBar(Activity activity) {
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
		view.destroyDrawingCache();
		return bp;

	}

	/**
	 * 获取当前屏幕截图，不包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithoutStatusBar(Activity activity) {
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		Rect frame = new Rect();
		activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
		int statusBarHeight = frame.top;

		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height - statusBarHeight);
		view.destroyDrawingCache();
		return bp;

	}

	public static final int getHeightInPx(Context context) {
		final int height = context.getResources().getDisplayMetrics().heightPixels;
		return height;
	}

	public static final int getWidthInPx(Context context) {
		final int width = context.getResources().getDisplayMetrics().widthPixels;
		return width;
	}

	public static final int getHeightInDp(Context context) {
		final float height = context.getResources().getDisplayMetrics().heightPixels;
		int heightInDp = px2dip(context, height);
		return heightInDp;
	}

	public static final int getWidthInDp(Context context) {
		final float height = context.getResources().getDisplayMetrics().heightPixels;
		int widthInDp = px2dip(context, height);
		return widthInDp;
	}

	public static int dip2px(Context context, float dpValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dpValue * scale + 0.5f);
	}

	public static int px2dip(Context context, float pxValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}

	public static int px2sp(Context context, float pxValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}

	public static int sp2px(Context context, float spValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (spValue * scale + 0.5f);
	}

}
